html,
body {
  margin: 0px;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
  background: transparent;
}

*::-webkit-scrollbar-track {
  border-radius: 4px;
}

*::-webkit-scrollbar-track:hover {
  border-radius: 4px;
  background-color: rgba(255, 255, 255, 0.1);
}

*::-webkit-scrollbar-thumb {
  border-radius: 4px;
  background-color: rgba(255, 255, 255, 0.2);
}

*::-webkit-scrollbar-thumb:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

*::-webkit-scrollbar-corner {
  background: transparent;
}

button {
  background-color: transparent;
  border: none;
}

.tool_bar {
  display: flex;
  flex-direction: column;
  background-color: #333333;
}

.tool_button {
  position: relative;
  color: #999999;
  background-color: transparent;
  font-size: 16px;
  /* width           : 24px;
  height             : 24px;
  min-width          : 24px;
  min-height         : 24px;
  max-width          : 24px;
  max-height         : 24px;
  padding            : 0px; */
}

.tool_button:hover {
  color: white;
}

.root {
  display: flex;
  overflow: hidden;
  align-items: stretch;
  height: 100%;
}

.blackboard {
  position: relative;
  overflow: auto;
  flex: 1;
  background: rgb(30, 30, 30);
}

.layer_row {
  display: flex;
}